137 lines
4.2 KiB
JavaScript
137 lines
4.2 KiB
JavaScript
chrome.runtime.sendMessage({method: "getStyles", url: getMeta("stylish-id-url") || location.href}, function(response) {
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if (response.length == 0) {
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sendEvent("styleCanBeInstalledChrome");
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} else {
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var installedStyle = response[0];
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// maybe an update is needed
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// use the md5 if available
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var md5Url = getMeta("stylish-md5-url");
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if (md5Url && installedStyle.md5Url && installedStyle.originalMd5) {
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getResource(md5Url, function(md5) {
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if (md5 == installedStyle.originalMd5) {
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sendEvent("styleAlreadyInstalledChrome", {updateUrl: installedStyle.updateUrl});
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} else {
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sendEvent("styleCanBeUpdatedChrome", {updateUrl: installedStyle.updateUrl});
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}
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});
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} else {
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getResource(getMeta("stylish-code-chrome"), function(code) {
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// this would indicate a failure (a style with settings?).
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if (code == null) {
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sendEvent("styleCanBeUpdatedChrome", {updateUrl: installedStyle.updateUrl});
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}
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var json = JSON.parse(code);
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if (json.sections.length == installedStyle.sections.length) {
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if (json.sections.every(function(section) {
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return installedStyle.sections.some(function(installedSection) {
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return sectionsAreEqual(section, installedSection);
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});
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})) {
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// everything's the same
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sendEvent("styleAlreadyInstalledChrome", {updateUrl: installedStyle.updateUrl});
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return;
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};
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}
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sendEvent("styleCanBeUpdatedChrome", {updateUrl: installedStyle.updateUrl});
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});
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}
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}
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});
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function sectionsAreEqual(a, b) {
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if (a.code != b.code) {
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return false;
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}
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return ["urls", "urlPrefixes", "domains", "regexps"].every(function(attribute) {
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return arraysAreEqual(a[attribute], b[attribute]);
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});
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}
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function arraysAreEqual(a, b) {
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// treat empty array and undefined as equivalent
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if (typeof a == "undefined")
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return (typeof b == "undefined") || (b.length == 0);
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if (typeof b == "undefined")
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return (typeof a == "undefined") || (a.length == 0);
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if (a.length != b.length) {
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return false;
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}
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return a.every(function(entry) {
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return b.indexOf(entry) != -1;
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});
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}
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function sendEvent(type, data) {
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if (typeof data == "undefined") {
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data = null;
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}
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var stylishEvent = new CustomEvent(type, {detail: data});
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document.dispatchEvent(stylishEvent);
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}
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document.addEventListener("stylishInstallChrome", function() {
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getResource(getMeta("stylish-description"), function(name) {
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if (confirm(chrome.i18n.getMessage('styleInstall', [name]))) {
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getResource(getMeta("stylish-code-chrome"), function(code) {
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// check for old style json
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var json = JSON.parse(code);
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json.method = "saveStyle";
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chrome.runtime.sendMessage(json, function(response) {
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sendEvent("styleInstalledChrome");
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});
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});
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getResource(getMeta("stylish-install-ping-url-chrome"));
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}
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});
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}, false);
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document.addEventListener("stylishUpdateChrome", function() {
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chrome.runtime.sendMessage({method: "getStyles", url: getMeta("stylish-id-url") || location.href}, function(response) {
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var style = response[0];
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if (confirm(chrome.i18n.getMessage('styleUpdate', [style.name]))) {
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getResource(getMeta("stylish-code-chrome"), function(code) {
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var json = JSON.parse(code);
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json.method = "saveStyle";
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json.id = style.id;
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chrome.runtime.sendMessage(json, function() {
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sendEvent("styleInstalledChrome");
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});
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});
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}
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});
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}, false);
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function getMeta(name) {
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var e = document.querySelector("link[rel='" + name + "']");
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return e ? e.getAttribute("href") : null;
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}
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function getResource(url, callback) {
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if (url.indexOf("#") == 0) {
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if (callback) {
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callback(document.getElementById(url.substring(1)).innerText);
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}
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return;
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}
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var xhr = new XMLHttpRequest();
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xhr.onreadystatechange = function() {
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if (xhr.readyState == 4 && callback) {
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if (xhr.status >= 400) {
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callback(null);
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} else {
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callback(xhr.responseText);
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}
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}
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}
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if (url.length > 2000) {
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var parts = url.split("?");
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xhr.open("POST", parts[0], true);
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xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
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xhr.send(parts[1]);
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} else {
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xhr.open("GET", url, true);
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xhr.send();
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}
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}
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